WRB (W.R. Berkley Corporation)
Insider Trading Activity
Every open-market purchase and sale reported by WRB officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-08-05 | WILLIAM R BERKLEY JR | Chairman, President and CEO | MIXED | — | — |
| 2026-08-05 | Philip S Welt | EVP & Secretary | MIXED | — | — |
| 2026-08-05 | Richard Mark Baio | EVP & CFO | MIXED | — | — |
| 2026-08-05 | JAMES G SHIEL | EVP - Investments | MIXED | — | — |
| 2026-06-04 | Jonathan Talisman | Director | A | — | — |
| 2026-06-04 | RONALD E BLAYLOCK | Director | A | — | — |
| 2026-06-04 | Christopher L Augostini | Director | A | — | — |
| 2026-06-04 | Robert Alan Rusbuldt | Director | A | — | — |
| 2026-06-04 | Mary C Farrell | Director | A | — | — |
| 2026-06-04 | Daniel Lynn Mosley | Director | A | — | — |
| 2026-06-04 | WILLIAM R BERKLEY JR | President and CEO | A | — | — |
| 2026-06-04 | Marie Angela Mattson | Director | A | — | — |
| 2026-06-04 | Maria Luisa Ferre | Director | A | — | — |
| 2026-06-04 | WILLIAM R BERKLEY | Executive Chairman | A | — | — |
| 2026-03-03 | MS&AD Insurance Group Holdings, Inc. | 10%+ Owner | Buy | — | — |
| 2026-02-27 | MS&AD Insurance Group Holdings, Inc. | 10%+ Owner | Buy | — | — |
| 2026-02-25 | MS&AD Insurance Group Holdings, Inc. | 10%+ Owner | Buy | — | — |
| 2026-02-20 | MS&AD Insurance Group Holdings, Inc. | 10%+ Owner | Buy | — | — |
| 2026-02-18 | MITSUI SUMITOMO INSURANCE CO LTD | 10%+ Owner | Buy | — | — |
| 2026-02-13 | MS&AD Insurance Group Holdings, Inc. | 10%+ Owner | Buy | — | — |
| 2026-02-11 | MS&AD Insurance Group Holdings, Inc. | 10%+ Owner | Buy | — | — |
| 2026-02-06 | MS&AD Insurance Group Holdings, Inc. | 10%+ Owner | Buy | — | — |
| 2026-02-04 | MS&AD Insurance Group Holdings, Inc. | 10%+ Owner | Buy | — | — |
| 2026-01-30 | MS&AD Insurance Group Holdings, Inc. | 10%+ Owner | Buy | — | — |
| 2026-01-28 | MITSUI SUMITOMO INSURANCE CO LTD | 10%+ Owner | Buy | — | — |
| 2026-01-23 | MS&AD Insurance Group Holdings, Inc. | 10%+ Owner | Buy | — | — |
| 2026-01-21 | MS&AD Insurance Group Holdings, Inc. | 10%+ Owner | Buy | — | — |
| 2026-01-16 | MS&AD Insurance Group Holdings, Inc. | 10%+ Owner | Buy | — | — |
| 2026-01-14 | MS&AD Insurance Group Holdings, Inc. | 10%+ Owner | Buy | — | — |
| 2026-01-09 | MS&AD Insurance Group Holdings, Inc. | 10%+ Owner | Buy | — | — |
| 2026-01-07 | MS&AD Insurance Group Holdings, Inc. | 10%+ Owner | Buy | — | — |
| 2026-01-02 | MS&AD Insurance Group Holdings, Inc. | 10%+ Owner | Buy | — | — |
| 2025-12-29 | MITSUI SUMITOMO INSURANCE CO LTD | 10%+ Owner | Buy | — | — |
| 2025-12-22 | MS&AD Insurance Group Holdings, Inc. | 10%+ Owner | Buy | — | — |
| 2025-12-19 | JAMES G SHIEL | EVP - Investments | G | — | — |
| 2025-08-19 | WILLIAM R BERKLEY | Executive Chairman | MIXED | — | — |
| 2025-08-19 | WILLIAM R BERKLEY JR | President and CEO | MIXED | — | — |
| 2025-08-19 | Richard Mark Baio | EVP & CFO | MIXED | — | — |
| 2025-08-19 | Philip S Welt | EVP & Secretary | MIXED | — | — |
| 2025-08-19 | Lucille T Sgaglione | EVP | MIXED | — | — |
| 2025-08-19 | JAMES G SHIEL | EVP - Investments | MIXED | — | — |
| 2025-06-13 | Robert Alan Rusbuldt | Director | A | — | — |
| 2025-06-13 | Christopher L Augostini | Director | A | — | — |
| 2025-06-13 | RONALD E BLAYLOCK | Director | A | — | — |
| 2025-06-13 | WILLIAM R BERKLEY JR | President and CEO | A | — | — |
| 2025-06-13 | Mary C Farrell | Director | A | — | — |
| 2025-06-13 | Jonathan Talisman | Director | A | — | — |
| 2025-06-13 | Maria Luisa Ferre | Director | A | — | — |
| 2025-06-13 | Marie Angela Mattson | Director | A | — | — |
| 2025-06-13 | Daniel Lynn Mosley | Director | A | — | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| — | 10%+ Owner | 58,567,377 | — |
| — | 10%+ Owner | 56,878,038 | — |
| — | Executive Chairman | 18,716,375 | — |
| — | Chairman, President and CEO | 8,203,800 | — |
| — | EVP & Secretary | 1,106,622 | — |
| — | EVP - Investments | 1,019,283 | — |
| — | EVP, Finance | 849,339 | — |
| — | SVP - Regional Operations | 767,502 | — |
| — | VP - Corporate Controller | 427,370 | — |
| — | Director | 337,048 | — |
| — | SVP - Chief Corporate Actuary | 296,578 | — |
| — | SVP-Excess and Surplus Lines | 286,875 | — |
| — | SVP - Alt. Mkts. Operations | 277,837 | — |
| — | EVP | 249,784 | — |
| — | EVP & CFO | 249,678 | — |
| — | EVP & Secretary | 239,764 | — |
| — | Director | 224,045 | — |
| — | Director | 218,181 | — |
| — | SVP - Information Technology | 199,307 | — |
| — | SVP-Insurance Risk Mgmnt. | 175,665 | — |
| — | SVP - Reinsurance Operations | 170,438 | — |
| — | Director | 160,484 | — |
| — | Director | 147,943 | — |
| — | Director | 140,635 | — |
| — | SVP - International | 138,375 | — |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the WRB quote page; the site-wide leaderboard is on the insider transactions hub.